Comcast subscribers might be surprised to find out their cable modem is being used as a public Wi-Fi hotspot. If you want to turn this off, you'll have to head to your account settings to opt-out. »6/03/14 11:00am 6/03/14 11:00am

If you live in a home larger than a single room, chances are you've experienced Wi-Fi reception issues before. We've offered several DIY solutions in the past, but those only go so far in larger homes with signal-killing walls. The Amped Wireless REC10 powers through those impenetrable corners of your home so you… »4/25/13 4:00pm 4/25/13 4:00pm

Android: We heard about WiFiKill a while ago, but it just seemed too, well, evil to write about until now. The app disables the connection of other devices on the same Wi-Fi network; essentially you can bump people off without them knowing. »10/27/11 5:00am 10/27/11 5:00am

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Windows: Reinstalling Windows is a pain even if you have backups, but most people don't consider backing up their wireless network settings before they reinstall. That's where the Wi-Fi Network Backup Manager comes in. »6/25/11 12:00pm 6/25/11 12:00pm

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Dear Lifehacker, Let's say I want to share a few files with someone sitting right beside me, and using a file-sharing service—like Dropbox—seems slow and unnecessary. What's the best way to share files with a friend sitting next to me? »10/07/10 8:53am 10/07/10 8:53am